Young's modulus and hardness of human trabecular bone with bisphosphonate treatment durations up to 20 years.
Osteoporos Int
; 30(2): 277-285, 2019 Feb.
Article
en En
| MEDLINE
| ID: mdl-30488274
ABSTRACT
Bone modulus from patients with osteoporosis treated with bisphosphonates for 1 to 20 years was analyzed. Modulus increases during the first 6 years of treatment and remains unchanged thereafter. INTRODUCTION:
Bisphosphonates are widely used for treating osteoporosis, but the relationship between treatment duration and bone quality is unclear. Since material properties partially determine bone quality, the present study quantified the relationship between human bone modulus and hardness with bisphosphonate treatment duration.METHODS:
Iliac crest bone samples from a consecutive case series of 86 osteoporotic Caucasian women continuously treated with oral bisphosphonates for 1.1-20 years were histologically evaluated to assess bone turnover and then tested using nanoindentation. Young's modulus and hardness were measured and related to bisphosphonate treatment duration by statistical modeling.RESULTS:
All bone samples had low bone turnover. Statistical models showed that with increasing bisphosphonate treatment duration, modulus and hardness increased, peaked, and plateaued. These models used quadratic terms to model modulus increases from 1 to 6 years of bisphosphonate treatment and linear terms to model modulus plateaus from 6 to 20 years of treatment. The treatment duration at which the quadratic-linear transition (join point) occurred also depended upon trabecular location. Hardness increased and peaked at 12.4 years of treatment; it remained constant for the next 7.6 years of treatment and was insensitive to trabecular location.CONCLUSIONS:
Bone modulus increases with bisphosphonate treatment durations up to 6 years, no additional modulus increases occurred after 6 years of treatment. Although hardness increased, peaked at 12.4 years and remained constant for the next 7.6 years of BP treatment, the clinical relevance of hardness remains unclear.Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Osteoporosis Posmenopáusica
/
Difosfonatos
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Hueso Esponjoso
Tipo de estudio:
Observational_studies
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Prevalence_studies
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Risk_factors_studies
Límite:
Aged
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Female
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Humans
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Middle aged
Idioma:
En
Revista:
Osteoporos Int
Asunto de la revista:
METABOLISMO
/
ORTOPEDIA
Año:
2019
Tipo del documento:
Article
País de afiliación:
Estados Unidos